Method of attaching hoisting-hooks.



, ,CHARLES D. MORLEY, on SI'. LOUIS, MISSOURI, ASSIGNOR To UNICI` CONSTRUCTION COMPANY, OF sfr. LOUIS, MISSOURI, a CORPORATION or DELAWARE.

noemer;

METHOD OF ATTACHING HOISTING-HOOKS.

Specification of Letters Patent.

Patented Nov. 26, 1912.

kTo all whom 'it may concern:

tion of a block of soft material having the stirrup embedded therein, Fig. 2, is a hori- `zontal section taken through a concrete unit,

,showing the block and stirrup carried thereby, embedded in a concrete unit, Fig. 3, is

a similar view showing theblock of 'soft material removed, Fig. 4`, is a horizontal section of aconcrete unit, illustrating the inode in which the stirrup and theblock of soft material is inserted in the unit prior to hardening of the latter, and, Fig. 5, is a Vview in perspective showing the manner in which the hook of a hoisting cable, engages the stirrup to effect raising of the concrete unit. f Y y .The stirrup designated l in the drawings, is preferably of U-Shap'e, having the ends of its legs bent or curved to form anchors 2.

3 indicates a block of soft material, preferably a mixture of one part of Sand and eight parts of cement, with water added in sucient quantity to make the mixture plastic, the block being .molded about the base ofthe stirrup so as to allow portions ofthe legs and the' anchoringends'2 thereof, to be exposed, and to project from the upper face of the block 3. -Block 3 is then permitted to harden with the base end of the stirrup -..ernbedded. therein.

iheeoncrete unit 4 which may be a slab,

if beam, girder, or other element of building structure, is molded, and while still`v plastic, the anchoring ends 2, and the exposed portions of the legs of the stirrup fr are forced downwardly int-o the material of the unt4, Fig. 4, illustratingthe Stirrup legs at the inception of the act of being forced into the concrete unit 4, for which purpose the block 3, of soft material is in-v verted as depicted in said Fig. 4. l

The stirrup legs and the block 3, of soft material, are forced in the concrete unit 4, until the base end 5, of the block 3, extends or lies flush with the top face' of the con- 'crete unit 4, as clearly depicted in Fig. 2, and after t-he concrete unit 4, has become set, or suiiiciently hardened, the soft material is picked away, or otherwise removed to eX- pose the loop of the stirrup, the space in the'concrete unit previously occupied by the block 3, forming a pocket 6, forl the reception ofv a vlifting hook 7, borne by a hoisting cable 8, or other elevating or lifting applias is of the same character of which the unit is made.

I do not wish to be limited to the form of stirrup illustrated, since any form of stirrup suitable for the'` lpurpose may be utilized,I

that is to say vany stirrup may be employed which is capable of being firmly anchored in the concrete unit, and whichxhas an eye, loop, or equivalent part for engagement with the hook of a lifting or hoisting appliance, the stirrup illustrated in the drawings, being an eXampleof one which. is capable of use in carrying out the present invention.

What is claimed is The method of attaching hoist-ing elements having distinct hook-engaging and anchoring port-ions to concrete units, which consists in embedding the hook-engaging portion of the hoisting element in a solid block of relatively soft cementitious material; permitting said vblock to'set and then inverting Said block and hoisting element and forcing the Same bodily into the concrete unit after the latter has been molded then outer face of said block is subst-anti In testimony whereof I hereunto affix my slgnature 1n the pl'eeence of two Wltnesses.

CHARLES D. MORLEY.

flush with the adjacent face of said unit; and finally removing` the material, of which said block is constructed after said unit has hardened, to expose the hook-engaging pon tion of said hoisting element and to produce 1 Vtnessee:

a pocket in said unit wherein said portion s WM. A, @HES/EN UT,

Wholly disposed. ARCHER "W1 RICHARDS. 

